This report describes the typical weather at the Simón Bolívar International Airport (Santa Marta, Colombia) weather station over the course of an average year. It is based on the historical records from 2010 to 2013. Earlier records are either unavailable or unreliable.
Santa Marta has a hot semi-arid steppe climate. The area within 25 mi of this station is covered by oceans and seas (47%), grasslands (17%), forests (15%), croplands (8%), and lakes and rivers (7%).
Over the course of a year, the temperature typically varies from 74°F to 91°F and is rarely below 72°F or above 93°F.
The warm season lasts from February 26 to April 5 with an average daily high temperature above 90°F. The hottest day of the year is March 6, with an average high of 91°F and low of 76°F.
The cold season lasts from October 18 to October 30 with an average daily high temperature below 89°F. The coldest day of the year is January 12, with an average low of 74°F and high of 89°F.
The length of the day does not vary substantially over the course of the year, staying within 47 minutes of 12 hours throughout. The shortest day is December 21 with 11:29 hours of daylight; the longest day is June 21 with 12:47 hours of daylight.
The earliest sunrise is at 5:32am on June 2 and the latest sunset is at 6:25pm on July 9. The latest sunrise is at 6:21am on January 29 and the earliest sunset is at 5:30pm on November 18.
Daylight saving time (DST) is not observed in 2013.
The median cloud cover ranges from 27% (mostly clear) to 65% (partly cloudy). The sky is cloudiest on October 8 and clearest on January 27. The clearer part of the year begins around December 2. The cloudier part of the year begins around March 4.
On January 27, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 64% of the time, and overcast or mostly cloudy 3% of the time.
On October 8, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 50% of the time, and clear or mostly clear 18% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around September 6, occurring in 75% of days. Precipitation is least likely around January 27, occurring in 1% of days.
Over the entire year, the most common forms of precipitation are thunderstorms and drizzle.
Thunderstorms are the most severe precipitation observed during 80% of those days with precipitation. They are most likely around September 4, when it is observed during 66% of all days.
Drizzle is the most severe precipitation observed during 17% of those days with precipitation. It is most likely around November 3, when it is observed during 12% of all days.
During the warm season, which lasts from February 26 to April 5, there is a 8% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of thunderstorms (65% of days with precipitation have at worst thunderstorms) and drizzle (34%).
During the cold season, which lasts from October 18 to October 30, there is a 60% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of thunderstorms (77% of days with precipitation have at worst thunderstorms) and drizzle (17%).
Either snow is exceptionally unlikely to fall at any time during the year at this location or this station does not reliably report precipitation types.
The relative humidity typically ranges from 53% (mildly humid) to 90% (very humid) over the course of the year, rarely dropping below 46% (comfortable), or exceeding 94% (very humid).
The air is driest around February 29, at which time the relative humidity drops below 57% (mildly humid) three days out of four; it is most humid around November 9, exceeding 89% (very humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a year, the dew point typically varies from 67°F (muggy) to 79°F (oppressive) and is rarely below 65°F (mildy humid) or above 80°F (very oppressive).
Over the course of the year typical wind speeds vary from 0 mph to 14 mph (calm to moderate breeze), rarely exceeding 18 mph (fresh breeze).
The highest average wind speed of 6 mph (light breeze) occurs around March 13, at which time the average daily maximum wind speed is 14 mph (moderate breeze).
The lowest average wind speed of 2 mph (light air) occurs around June 24, at which time the average daily maximum wind speed is 7 mph (light breeze).